Signaling system.



E. E. BACKUS.

SIGNALING SYSTEM.

APPLICATION FILED APR. 2B. 1913.

1 1 35.%@?. nted Apr. 13, 1915.

ZgZ/zesses THE NORRIS PETERS CO.. PHOTOLITHO WASHINGTON, D. c.

STTS racrnu c irrria EDWARD IE. BACKUS, 01E CHIGAGU, ILLINOIS, ASSIGNOB, BY MESNE ASSIGNMENTS, T0 HALL SWITCH & SIGNAL UQMPANY, A CQRPORATION 01E MAINE.

SIGNALING SYSTEM.

Specification of Letters Patent.

Patented Apr. 13, 1915,.

Application filed. April 2s, 1913. serial in. teams.

To all whom it may concern:

Be it known that I, EDWARD E. BACKUS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Signaling Systems, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to concentration systems in which the calls for a certain station which come in over a great number of lines are concentrated on one table, and the calls on these lines which are not for said station pass through without the attention of the attendant.

The object of my invention is to make systems of this character more reliable and to increase their efficiency in many respects, as

will be pointed out hereinafter.

Tn the specific form which is used as a basis for the explanation herein, I have shown a system in which is used a station selector of the kind set forth in Letters Patent No. 906,523, issued Dec. 15, 1908 to Edwin R. Gill. This station signal controlling instrument is a selector having a controlling electromagnet provided with a locking coil so that when the instrument is actuated the parts remain in the actuated position until the circuit through the locking coil is broken. It is apparent that any suit-- able kind of instrument having an electromagnet may be used and the one above men tioned has been specified because I have used it in such a system and it is satisfactory.

I will explain this particular form of carrying out my invention by referring to the accompanying drawing illustrating the same diagrammatically.

Referring to the drawing 1 set forth the equipment at a central station, it being understood, that there may be any number of lines entering and any number of stations on each line. At a central station I show a jack having the springs 1 and 2 connected respectively to the line wires 3 and a. A plug 5 is adapted to connect the conductors 6 and 7 with the jack springs l and 2 respectively, thus to include the central station devices m the main circuit. The said apparatus includes a relay 8 which is adapted to receive impulses coming in over the conductors 6 and 7, which relay is in series with the conductor 7 which extends through switch 9 and conductor 10, to the spring 11 of a spring jack. The conductor 6 extends to the spring 12 of the same spring jack. This spring jack, together with its lamp 13, is mounted at a table at which there are a plurality of jacks and spring jacks. Whenever a lamp 13 is actuated the operator can, through the agency of this jack, connect his set with the line over which the call has come and the insertion of the plug into this spring jack extinguishes the lamp 13 as will presently appear. I therefore arrange at the central station a central stationing table having a plurality of jacks 14 and lamps 13, the same being indicated diagrammatically, the line connections, however, for the sake of simplicity being illustrated only in connection with one spring jack 1% and one lamp 13. It will thus be seen that when any particular lamp 13 is energized it remains energized until the operator plugs in to answer the'call, the plugging in acting to restore the selector devices to normal as will presently appear.

It is of importance to have the signal continued otherwise when a plurality of incoming telegraph signals are given it would be diflicult to distinguish them. The particular selector hereinafter described is capable of receiving code or telegraphic signals and when the code for a given line is received the selector energizes the corresponding lamp 13. This lamp then remains energized until the call is answered. The impulses as they energize the relay 8 close circuit between the armature 15 of this relay and its front contact 16, thereby closing circuit through the operating coil 17 of a relay 18 through the agency of the battery 19. This electromagnet 18 is the one previously referred to as disclosed in the said Gill patent and is capable of receiving code signals of the telegraphic variety or otherwise and serves when actuated to its proper position by the proper code signal to close circuit through the springs 20 and 21, thereby energizing the corresponding lamp 13. The circuit through the lamp 13 can be traced from the right hand pole of the battery 19 through conductor 22, holding coil 23 provided upon the electromagnet 18, spring 21, spring 20. conductor 2 1, spring 25 of the spring jack 14, spring 26, lamp 13, conductor 27, electromagnet 28, conductor 29 to the left hand pole of the battery 19. It will thus be seen that Whenthe contacts and 21 are closed the coil 23 'Iholds all) the p arts in their actuated positions" until the circuit through the sprmgs 25 and 26 18 broken as when a plug is inserted in the spring jack 14, at which timethe-selector, of which the electromagmet 18 forms apart, is automatically restored to normal and the lamp 13 deenergized. The

pilot relay 28 may serve to operate a suitable pilot seam-d bell 31, conductors 32' a -33being connected to any suitable source-er?cement.

what has been described it will I be understood that a plurality ofentering lines may be provided at a. central stationing table and e ach naeprovided with a lamp, which is suitably energited when the particular cbdeisfreceiv'ed to"a,ctuate-its particular contacts QO' and 21 Thislarnp reniainsenergiaed and theselect'or parts remain in the actuated position until thee-all is answered by the insertion of a plug into the correbe ratherconfusing, but merely the visible "signals, as for instance, the lights 18. By

reason of the instrumentalities thus explained no additional call can be received over the device until the preceding call has been i answered;

. It'vv'ill be apparent that my invention is susceptible of many modifications, but it is thought that the spirit of theinvention will be clear'from the above description of this specifi'c' einbodim'ent thereof.

re ation what-I claim as new and desire to for each line at the central station under secure by Letters Patent is:

1: In asyster'nof the character described, the-combination of a central station, a plur'ality of'lines'entering'said station, a signal thecontrolfof a selector,a selector at said central-station for eac'hline responsive only to given arrangement of impulses and adaptedto maintain said-signal in operative condition'until the call is answered.

2'. In a system of the character described,

the"comb'ination of a central station, a plurality' oi 'line s' entering said station, each line'- having a'f plurality of substations thereon,-a signal for each line, a selector at the said central station for each line controlling said signal and responsive to a call fi eman-y" substation on the corresponding "line and adapted tomaintain said signal in its actuated condition until the call is anstrata and means to restore said selector andsi gnalto normall 8. In a system of thecharacter described, thecornbi'nationof a central station, a plurality of lines entering said station,- a selector said central station for each line responsive only to a given arrangement of impulses, a signal controlled by each selector and means operated with each signal for keeping the signal in operative condition until the call is answered.

4, In a system of the character described, the combination of a central station, a plurality oi'lines entering said station, each line having a plurality of substations thereon, a selector at the said central station for each line responsive to a call from any substation o'n-the corresponding line, a signal under the control of said selector, me'alrs'operable'upon circuit controlling actuation of said selector to maintain-saidsig-nal in its actuated position, andmeanstO restore saidsel'ector signal to normal,

5'. Ina system of thefcharacter described, the combination of a central station, a plurality of lines entering said station, each line having a plurality ofsubstationsthereon, a

V. n s H controlofsaid selector, a locking coil-oper- Having, however, thus described my 1nable, upon circuit controlling actuation of signal in their actuated position, and a switch to break the circuit through said locking coil to restore'said-selector and'signal to normal,

7. In a system of the character described, the combination of a'central station, a p'lurality'of linesentering said station. each line having a plurality of substations thereon, a selector at the said central station for each line responsive to a-call from" any substation on the cor respondin'g line, asignal controlled by said selector, a lockingcoil forsaid selector to hold said selectorinits actuated position after said selector has reached signal operating position, and means tobreak circuit through saidcoil to clear said'sel'ector 1 and restore the signal.

8.- Ina system of the character described, the combination of a centralstation, a plurality of lines entering said station, eachline having aplura'lity oisubsta'tionsthereon, a selector at the said central station foreach line responsive to acall frorn any substation on the correspondingline, a signal controlled by said selector, a'loclting coil for said selector to hold said selector in its actuated position after said selector has reached signal operating position, and means to break circuit through said coil to clear said selector and restore the signal, said means including a spring ack.

9. In a system of the character described, the combination of a central station, a plurality of lines entering said station, each line having a plurality of substations thereon, a selector at the said central station for each line responsive to a call from any substation on the corresponding line, a signal controlled by said selector, a locking coil for said selector to hold said selector in its actuated position after said selector has reached signal operating position, means to break circuit through said coil to clear said selector and restore the signal, and a battery for supplying current to said selector and said coil.

10. In a system of the character described, the combination of a central station,

Copies of this patent may be obtained for five cents each, by addressing the a plurality of lines entering said station, each line having a plurality of substations thereon, a selector at the said central station for each line responsive to a call from any substation on the corresponding line, a signal controlled by said element, a locking c011 for said selector to hold said selector in its actuated position after said selector has reached signal operating position, means to break circuit through said coil to clear said selector and restore the signal, said means including a spring jack, and a battery for supplying current to said selector and said coil.

In Witness whereof, I hereunto subscribe my name this 9th day of January A. D.,

EDW. E. BACKUS. Witnesses:

HAZEL ANN J ONES, MAX W. ZABEL.

Commissioner of Patents,

Washington, D. C. 

